Well, there's no point being dishonest, 6A's are very good gcse results but they do not compare to 90% of medicine applicants who usually have atleast 5A*. However, if you apply for a uni which is probably a little lower in the league tables why not? I mean GCSEs are not the single determining factor in deciding whether you get in, whereas AS levels ARE. Make sure you get AAAA at AS, work like Joel even if you have to